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Robinson and Greenman—Mexican Plants. 157 
larly pinnatifid, green and glabrous above, paler and arachnoid- 
pubescent beneath; lateral segments in about 8 pairs, divaricate, 
lanceolate, acuminate, repand-dentate, about 13 inches long, a 
third as broad; the terminal one scarcely larger, narrowly del- 
toid ; lower leaves on slender petioles (7 inches long); the upper 
upon winged petioles, auriculate-clasping at the base; bracts of 
the diffuse panicle narrowly lanceolate, attenuate, sessile, auricu- 
late-clasping: heads discoid, usually solitary at the end of the 
slender branches; bractlets subulate-filiform: involucre about 
13-phyllous, 4 lines long, pubescent, 20-24-flowered; the scales 
minutely dark-tipped and tufted at the apex: flowers ochroleu- 
cous: corolla segments short: achenes glabrous.—Collected by 
C. G. Pringle, on the Sierra de Clavellinas, altitude 9,000 feet, 24 
October, 1894 (No. 6010). 
SENECIO RETICULATUS DC. A plant of habit and foliage 
identical with an authenticated specimen of this species from 
De Candolle’s herbarium, has been collected by Mr. Pringle on 
the Nevado de Toluca in the State of Mexico, 7 September, 
1892 (No. 5262). The heads, however, have about twice as many 
flowers (8 rays and 26 disk flowers). The scales of the involucre 
are also more numerous, being about 16 in number. 
CACALIA LONGIPETIOLATA. Slender, 3 feet or more in height, 
apparently strict: stem terete, purplish and glaucous: leaves 
palmately 5-7-lobed, 3 to 4 inches in diameter, cordate with nar- 
row sinus, green, puberulent and reticulated above, grayish- 
tomentulose beneath; lobes lanceolate, stellately divergent, den- 
ticulate, acute and mucronate; sinuses rounded ; petioles slender, 
smooth, about 4 inches in length: heads few, large, about 9 lines 
in length, terminal upon the long slender almost naked branches 
of an open panicle ; involucre calyculate with short loose spread- 
ing linear or subulate bracts, the inner erect bracts about 9, 
oblong, dark-colored with scarious margins, narrowed to an 
obtusish apex: flowers about 50 in a head; tube slender, thick- 
ened at the base; throat ampliate, very short; lobes rather long 
but recurved or coiled in anthesis: achenes smooth.—Collected 
by C.G. Pringle, on dry ledges of the Sierra de San Felipe, 
Oaxaca, altitude 7,000 feet, 10 October, 1894 (No. 5828). 
CaCALIA MEGAPHYLLA. Tall, 6 to 10 feet high: stem terete, 
striate, ferrugineous-tomentulose: radical leaves large, centrally 
peltate, about 10-lobed, orbicular in outline, 1 to 2 feet in diame- 
ter, finely pubescent above, slightly paler and grayish-tomentose 
beneath; lobes ovate-lanceolate, sharply and unequally sinuate- 
dentate, usually 2-3-lobed toward the apex; secondary lobes only 
slightly divergent not divaricate with reference to the primary 
lobes, acute: panicle ample, pyramidal, bracts reduced, subulate; 
heads numerous, 5-flowered, 5 to 7 lines long, shortly and incon- 
spicuously calyculate at the base or ecalyculate : involucral scales 
5, ovate-oblong narrowed to an obtusish apex, densely tomentose, 
4 to 5 lines long, nearly or quite 2 lines broad: akenes glabrous, 
stout, many-striate, light-colored.—Collected by C. G. Pringle, on 
